Thinkathon 

A contest of wits; a moment in which massive brain power is used and tested

This is simple math, it's no Thinkathon!
Stop being retarted, we're not in a Thinkathon.

Thinkathon by KouzDiggsFreck April 13, 2010

Tinkaton 

A Fairy/Steel type pokemon debuted in Gen 9. It loves killing Corviknight.

Corviknight: *Flying around*
Tinkaton: omae wa mou shindeiru
Corviknight: NANI!?
Tinkaton: *Destroys Corviknight with Gigaton Hammer*
Corviknight: *Dies of Tinkaton*

Tinkaton by beluga the suzzi cat December 29, 2022

Thinkatory 

A person who thinks too much about stupid and arbitrary things, like grudges or past memories

He is such a thinkatory person because he can not stop thinking about that one time he tripped on the playground in 3rd grade.

Thinkatory by Kickitupanacho77 June 19, 2019

Thinkaholic 

one who feels compulsively the need to (think something) <thinkaholic>

Giles couldn’t get to sleep because he was thinking about what to think about on the way to work, he's definitely a 'thinkaholic'

Thinkaholic by GWTB January 28, 2012

thunkathunk 

An epiphany had whilst high

Wow man, I just thunkathunk

thunkathunk by Boz33 September 30, 2021

thinsational

to be so thin and hott that everyone is totally jealous of you ,even though they may say "gross" or call you anorexic, they all really wish they could be that skinny

oh man, look at her totally sweet back ribs! shes sooo hott and thin, shes thinsational!

thinsational by totally hott November 7, 2008

Thinktionary

A notebook you put your thoughts/ideas in.

Oh I just came with an idea! Thinktionary time!

Oh that just gave me a thought to put in my Thinktionary!

Thinktionary by CaptainJefe September 10, 2010